육상 100 m 속도개선을 위한 Elongated Start 출발 구간의 운동학적 비교분석

This study is performed to provide useful information to shorten the record by understanding the physical factor of the Elongated start through three dimensional image analysis with excellent group (A) that is composed of female university players who have won first prizes in national contests and non-excellent group (B) of female university players. There were 8 female university players. The record of short distance contest is determined by the piech and stride. The time from the start to three steps was 0.71 sec for the group A and 0.74 sec for the group B. It showed that group A was faster at the first three steps. The stride from the start to three steps was 3.14 m for the group A and 3.08m sec for the group B. It showed that group A had bigger stride. When we measured the change of horizontal velocity of physical center, the group A showed high increase of horizontal velocity in the all steps. When we measured the change of vertical velocity of physical center, the g roup Bshowed big change. For the angle of the coxa, the superior group had larger flection than the inferior, when the foot contacted on the ground for the first steps. In a conclusion, the horizontal speed and the stride per block should be increased for theshorter sprint start motion. For this, shortening the reaction time and the ground-contact time per block is prerequisite. The ideal start is therefore that the angles of the ankle, the knee joint and the coxa at landing should be so small as to accelerate the angle speed of each joint.